Terbium · Origin deep dive

Terbium oxide from Jiangxi and Guangdong separation hubs exports through southern Chinese container gateways under licence.

Tb4O7 at 99.99% typical, used in grain-boundary diffusion for premium NdFeB magnets and in magnetostrictive alloys.

Kilogram-scale drummed lots under the April 2025 heavy-RE export-control regime, with each shipment individually licensed.

High-performance magnet producers for EV and defense applications, plus phosphor and Terfenol-D niche users.

Quota and licence cadence dominates trading rhythm; end-demand tracks EV and wind build rates rather than seasons.

Terbium's tiny, China-monopolized market means export-control enforcement can move prices multiples in weeks with no supply response.

Lynas Kuantan's new heavy-RE circuit and planned US separation lines are the only non-China terbium oxide sources emerging.

Separated Tb oxide in first commercial lots from 2025, undergoing qualification at Western magnet and defense customers.

Delivered gram-to-kilogram strategic parcels under government-linked offtakes, far from open-market liquidity.

Defense primes and Western magnet plants that must certify China-free heavy rare earths for procurement compliance.

Availability follows plant ramp and qualification milestones, not seasons, with volumes committed years forward.

Terbium is the scarcest link in the non-China chain; feedstock limits mean the premium persists even if dysprosium supply diversifies.

Kachin State ionic-clay carbonate moves overland through Yunnan border crossings into Chinese separation plants, with no maritime leg.

Heavy-RE carbonate with terbium values alongside dysprosium, the critical raw input China's own mines cannot fully replace.

Cross-border truck trade subject to Chinese customs pulses and Myanmar checkpoint politics, consolidated at Yunnan entry hubs.

Chinese separators feeding Tb oxide into the domestic magnet industry and licensed export channels.

Wet-season mining slowdowns in Kachin compound conflict interruptions, making feed supply lumpy across the year.

The KIA's control of Kachin mining districts leaves global terbium feed hostage to one insurgency's taxation and export decisions.